Name the phenomenon which causes the following changes:
(a) Formation of water vapor from water.
(b) Disappearance of camphor.
(c) Conversion of ice into water.
(d) Conversion of water into steam.
(a) Formation of water vapor from water is evaporation.
(b) Disappearance of camphor is sublimation.
(c) Conversion of ice into water is melting.
(d) Conversion of water into steam is boiling.
